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Back MatterSource: Publications of the Astronomical Society of the Pacific, Vol. 18, No. 111 (December 10,1906)Published by: The University of Chicago Press on behalf of the Astronomical Society of the PacificStable URL: http://www.jstor.org/stable/40692804 .

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32O Publications of the Astronomical Society, &c.

OFFICERS OF THE SOCIETY. Mr. A. O. Leuschner President Mr. Chas. S. Cushing First Vice-President Mr. A. H. Babcock Second V ice-President Mr. W. W. Campbell Third V ice-President Mr. R. G. Aitken) _ _, -r, „ „ > Secretaries _, Mr. F. -r, R. „ Ziel „ J Mr. F. R. Ziel Treasurer Board of Directors - Messrs. Aitken, Babcock, Burckhalter, Campbell, Crocker,

Cushing, Hale, Leuschner, Richardson, Spreckels, Ziel. Finance Committee - Messrs. Cushing, Crocker, Richardson. Committee on Publication - Messrs. Aitken, Townley, Newkirk. Library Committee - Mr. von Geldern, Mr. Richardson, Mrs. Schild. Committee on the Comet-Medal - Messrs. Campbell (ex-officio), Burckhalter,

Perrine. NOTICE.

The attention of new members is called to Article VIII of the By-Laws, which provides that the annual subscription, paid on election, covers the calendar year only. Subsequent annual payments are due on January ist of each succeeding calendar year. This rule is necessary in order to make our bookkeeping as simple as possible. Dues sent by mail should be directed to Astronomical Society of the Pacific, 806 Franklin Street, San Francisco.

It is intended that each member of the Society shall receive a copy of each one of the Publications for the year in which he was elected to membership and for all subsequent years. If there have been (unfortunately) any omissions in this matter, it is requested that the Secretaries be at once notified, in order that the missing numbers may be supplied. Members are requested to preserve the copies of the Publications of the Society as sent to them. Once each year a title-page and contents of the preceding numbers will also be sent to the members, who can then bind the numbers together into a volume. Complete volumes for past years will also be supplied, to members only, so far as the stock in hand is sufficient, on the payment of two dollars per volume to either of the Secretaries. Any non-resident member within the United States can obtain books from the Society's library by sending his library card with ten cents in stamps to the Secretary A. S. P., 806 Franklin Street, San Francisco, who will return the book and the card.

The Committee on Publication desires to say that the order in which papers are printed in the Publications is decided simply by convenience. In a general way, those papers are printed first which are earliest accepted for publication. Papers intended to be printed in a given number of the Publications should be in the hands of the Committee not later than the 20th of the month preceding date of publication. It is not possible to send proof sheets of papers to be printed to authors whose residence is not within the United States. The responsibility for the views expressed in the papers printed, and for the form of their expression, rests with the writers, and is not assumed by the Society itself.

The titles of papers for reading should be communicated to either of the Sec- retaries as early as possible, as well as any changes in addresses. The Secretary in San Francisco will send to any member of the Society suitable stationery, stamped with the seal of the Society, at cost price, as follows: a block of letter paper, 40 cents; of note paper, 25 cents; a package of envelopes, 25 cents. These prices include postage, and should be remitted by money-order or in U. S. postage stamps. The sendings are at the risk of the member.

Those members who propose to attend the meetings at Mount Hamilton during the summer Should communicate with "The Secretary Astronomical Society of the Pacific," 806 Franklin Street, San Francisco, in order that arrangements may be made for transportation, lodging, etc.

PUBLICATIONS ISSUED BI-MONTHLY. • (February, April, June, August, October, December.)



INDEX TO VOLUME XVIII.

PAGE

Adams, Walter S. (with G. E. Hale and H. G. Gale), On the Cause of the Characteristic Phenomena of Sun- Spot Spectra, 268; (with G. E. Hale), Photographic Observations of the Spectra of Sun-Spots 76

Address of the Retiring President of the Society in Awarding the Bruce Medal to Geheimer Ober-reg. Rath Professor Dr. Hermann Carl Vogel, by S. D. Townley 101

Aitken, R. G., A Double-Star Problem, 70; Double-Star Work at the Flower Observatory, 174; The Duplicity of the Prin- cipal Component of 2 2348. 227 ; Measures of the Double Stars Contained in the Mensurœ Micrometricœ of F. G. W. Struve ... by Thomas Lewis (Review of), 281; The Nebu- lar Hypothesis, in; A New Variable Star, 312; New Com- panions to Two Struve Stars, 251 ; Note on 2 2028 (Rej.), 272; Note on the Comets Discovered at the Lowell Observatory, 83 ; Stellar Parallax Work at the Yale Observatory, 275; Three New Rapid Binaries 227

Albrecht, Seb., The Spectroscopic Binary Y Ophiuchi, 66; The Spectroscopic Binary U Aquilce 142

Annular Nebula in Lyra, on the Parallax of the Central Star of the, by B. L. Newkirk 140

Astronomical Observations in 1905, by Torvald Kohl .... 122 Astronomical Society of the Pacific :

Annual Meeting of the, with Treasurer's Report, etc 184 Awards of the Donohoe Comet- Medal of the . . 57, 58, 304, 305 Bruce Medalists of the 1 Corresponding Institutions of the 9 Exchanges of the n List of Members of the 1 Minutes of Meetings of the 99, 184, 233, 319 Minutes of Meetings of the Board of Directors of the . . . .

98, 183, 184, 233, 287, 319 Notice to Members and Correspondents of the 192 Officers of 1, 100, 189, 234, 264, 288, 320 Patrons of the 1 A Statement by the President of the, A. O. Leuschner . . . 191

Award of the Bruce Medal to Professor Dr. Hermann Carl Vogel I0I> ^3

Award of the Draper Medal to Director Campbell 229 Award of the Gold Medal of the Royal Astronomical Society to

Professor W. W. Campbell 142



322 Publications of the PAGE

Bailey, S. T., Double Variable Stars 171 Berkeley Astronomical Department, Notes from the ..... 86 Binaries, Three New Rapid, by R. G. Aitken 227 Blatr, G. B. (with Frank Schlesinger), Note on Anomalous

Refraction 46 Burns, K., Orbit of the Spectrographic Binary X Andromèdes . . 306 California Earthquake at Ukiah, The, by S. D. Townley . . . 217 Campbell, W. W., Appointments to Lick Observatory Staff, 253;

Award of the Draper Medal to, 229; Award of the Gold Medal of the Royal Astronomical Society to, 142; Changes in the Personnel of the D. O. Mills Expedition to the Southern Hemisphere, 85 ; Coming Total Eclipses of the Sun, 81 ; The Crossley Reflector Photographs of Eros, 144; The Death of Professor Langley, 144; First Catalogue of Spectroscopic Binaries (with H. D. Curtis), 62; Seven New Spectroscopic Binaries (with J. H. Moore), 308; History of the Naming of Mt. Hamilton, 225; The Lick Observatory-Crocker Eclipse Expedition to Spain (with C. D. Perrine), 13; Observations of Eclipse Shadow-Bands of August 30, 1905, 131 ; On the Earthquake of April 18, 1906, 213; On the Chile Earthquake of August 16, 1906, 313; Personal Notes, 228; The Radial Motions of Polaris, 307; Report of the Lick Observatory, 1905, 148; Two Stars Whose Velocities are Variable (with J. H. Moore) 137

Castor, The System of, by H. D. Curtis 132 Chamberlin Observatory, Report of, 1905, by H. A. Howe . . . 146 Champreux, A. J. (with R. T. Crawford), Elements of Comet

b 1906 (Kopff) 139 Color of the Shadows of Jupiter's Satellites Projected on the

Disk of the Planet, by C. D. Perrine yy Comet c 1905 (Giacobini) :

Note on, by R. T. Crawford 82 Photographs of, by Elliott Smith .* . .' 83

Comet a 1906 (Brooks), by J. D. Maddrill 84 Comet b 1906 (Kopff), Elements of, by R. T. Crawford and

A. J. Champreux 139 Comet d 1906 (Finlay's Periodic), by E A. Fath 270 Comet e 1906 (Kopff), Note on, by R. T. Crawford 271 Comet Notes, by R. T. Crawford 138 Comet Notes, by J. D. Maddrill 134 Cometary Motion, Two Articles on, by B. L. New kirk .... 88 Comet- Medal, Awards of the Donohoe 57, 58, 304, 305 Comets g and h 1906, by E. A. Fath 311 Comets Discovered at the Lowell Observatory, Note on the,

by R. G. Aitken . 83 Coming Total Eclipses of the Sun, by W. W. Campbell .... 81 Corrigenda 86, 274, 314



Astronomical Society of the Pacific. 323 PAGE

Crawford, Russell Tracy, Comet Notes, 138; Elements of Comet b 1906 (Kopff) (with A. J. Champreux), 139; An Introduc- tion to Astronomy. By Forest Ray Moulton. (Review), 259; Note on a Convenient Method of Computing, from Elements, the Daily Motion of Geocentric Right Ascension and Declina- tion, 226; Note on Comet c 1905 (Giacobini), 82; Note on Comet é? 1906 (Kopff), 271; Orbit of the Seventh Satellite of Jupiter 135

Curtis, Heber D., First Catalogue of Spectroscopic Binaries (with W. W. Campbell), 62; The System of Castor . . . 132

D. O. Mills Expedition to the Southern Hemisphere, Changes in the Personnel of the, by W. W. Campbell 85

Daily Motion in Geocentric Right Ascension and Declination, Note on a Convenient Method of Computing, from Elements, the, by R. T. Crawford 226

Double- Star Problem, A, by R. G. Aitken 70 Double-Star Work at the Flower Observatory, by R. G. Aitken . 174 Double Stars :

Duplicity of the Principal Component of 2 2348, by R. G. Aitken 227 Measures of the, Contained in the Mensurœ Micrometricœ of

F. G. W. Struve ... by Thomas Lewis, Review by R. G. Aitken 281

New Companions to Two Struve Stars, by R G. Aitken . . . 251 Note on 22028 CRej.), by R. G. Aitken 272

Double Variable Stars, by S. T. Bailey 171 Earthquake :

The California, at Ukiah,'by S. D. Townley 217 On the, of April 18, 1906, by W. W. Campbell 213 On the Chile Earthquake of August 16, 1906, by W. W. Camp-

bell 313 Earthquakes :

Observations of Distant, by F. Omori 193 On Seismic Motion and Some Relations of Earthquakes to Other

Phenomena, by F. Omori 235 The Rossi-Forel Scale, Amended 219 (See, also, Seismograph.)

Eclipse Expedition, The Lick Observatory-Crocker: to Egypt, by W. J. Hussey $7 to Spain, by W. W. Campbell and C. D. Perrine ..... 13

Eclipse Shadow-Bands of August 30, 1905, Observations of, by W. W. Campbell 131

Eclipses of the First Satellite of Jupiter, by S. Einarson . . . 140 Eclipses of the Satellites of Jupiter, by J. D. Maddrill .... 67 Eclipses of the Satellites of Saturn, Occurring in the Year 1906,

by H. Struve 203 Eclipses of the Sun, Coming Total, by W. W. Campbell ... 81 Einarson, Sturla, Eclipses of the First Satellite of Jupiter . . 140



324 Publications of the

Eros: page Comparison- Stars, by B L. Newkirk 317 The Crossley Reflector Photographs of, by W. W. Campbell . 144 The Measurement and Reduction of the Photographs of, Made

with the Crossley* Reflector in 1900, by C. D. Perrine . . . 226 Fath, E. A., Finlay's Periodic Comet, 270; Comets g and h 1906 . 311 First Catologue of Spectroscopic Binaries, by W. W. Campbell

and H. D. Curtis 62 Five-Foot Reflector of the Solar Observatory, The, by G. E. Hale. 224 Flint, A. S., A Test of a Transit Micrometer, by John F. Hay-

ford (Review) 90 Gale, Henry G., On the Cause of the Characteristic Phenomena

of Sun-Spot Spectra (with G. E. Hale and W. S. Adams) . 268 General Notes 88, 170, 230, 254, 275, 315 Greenwich Observatory, Report of 256 Hale, George E., The Five-Foot Reflector of the Solar Observa-

tory, 224 ; Height of the Hydrogen Flocculi, 221 ; Identification of Faint Lines in the Spectra of Sun- Spots, 222; New Mem- bers of the Staff of the Solar Observatory, 228; Note on the Level of Sun-Spots, 250; On the Cause of the Characteristic Phenomena of Sun-Spot Spectra (with W. S. Adams and H. G. Gale), 268; A 100-inch Mirror for the Solar Observa- tory, 272; Organization of the Computing Division of the Solar Observatory, 223; Photographic Observations of the Spectra of Sun-Spots (with W. S. Adams), 76; A Programme of Solar Research, 59; Report of the Solar Observatory of the Carnegie Institution of Washington, 1905, 156; A Road to Mt. Wilson, 251 ; Smithsonian Expedition to Mount Wilson, 229; Some Tests of the Snow Telescope ........ y s

Harvard Five-foot Reflector, The, by S. D. Townley .... 170 Howe, H. A., Report of Chamberlin Observatory, 1905 .... 146 Hussey, W. J., The Lick Observatory-Crocker Eclipse Expedi-

tion to Egypt 37 Hydrogen Flocculi, Height of the, by G. E. Hale . . . . . . 221 International Latitude Observatory, Ukiah, Report of, 1905, by

S. D. Townley 147 Jupiter:

Eclipses of the First Satellite of, by S. Einarson 140 Eclipses of the Satellites of, by J. D. Maddrill 67 Fifth Satellite of. The, by S. D. Townley 94 Orbit of the Sixth Satellite of, by C. D. Perrine 80 Orbit of the Seventh Satellite of, by R. T. Crawford .... 135 Reobservation of the Seventh Satellite of, by C. D. Perrine . . 274 Reobservation of the Sixth Satellite of, by C. D. Perrine . . 271 The Sixth and Seventh Satellites of, at the Opposition of

1905-1906, by C. D. Perrine 78 Color of the Shadows of the Satellites of, Projected on the Disk

of the Planet, by C. D. Perrine yy



Astronomical Society of the Pacific. 325 PAGE

Kohl, Torvald, Astronomical Observations in 1905 122 Langley, S. P., Note on the Death of, by W. W. Campbell . . 144 Latitude of Ukiah before and after April 18, 1906, The, by S. D.

Townley ?'i Leuschner, A. O., Report of Students' Observatory, Berkeley,

1905, 164; Seismological Stations in California, 218; A State- ment by the President of the Society 191

Lick Observatory: Appointments to the Staff of 253 Crocker Eclipse Expedition to Egypt, by W. J. Hussey ... 37 Crocker Eclipse Expedition to Spain, by W. W. Campbell and

C. D. Perrine 13 Honors for Members of the Staff of 87 Personal Notes 228 Report of, 1905, by W. W. Campbell 148 Seismograph Record of April 18, 1906, by J. D. Maddrill . . 212 Stability of the 36-Inch Equatorial of the, by R. G. Aitken . . 224 (See, also, Mount Hamilton.)

Lowell Observatory, Report of, 1905, by Percival Lowell . . . 152 Lowell, Perctval, Report of Lowell Observatory, 1905 . . . . 152 Luna, Roso de, Total Solar Eclipses (Shadow-Band Apparatus) . 53 Maddrill, James D., Comet a 1906 (Brooks), 84; Comet Notes,

134; Eclipses of the Satellites of Jupiter, 67; Lick Observa- tory Seismograph Record of April 18, 1906, 212; Note on the Variable Velocity and the Period oî S U Cygni, 252 ; Nova Aquile?, No. 2, 69, 310; Photometer Observations of B. D. -f 5i°.3Ó76, 312; Rainfall at Mount Hamilton 69

McNeill, Malcolm, Planetary Phenomeno. 55, 128, 209, 247, 265, 302 Moore, J. H., Seven New Spectroscopic Binaries (with W. W.

Campbell), 308; Note on the Recent Observations of the Radial Velocities of aDraconis, 66; The Spectroscopic Binary 'Hydrœ, 67; Two Stars Whose Velocities are Variable (with W. W. Campbell), 137; Untersuchungen an den Spektren der helleren Gasnebel, von J. Scheiner und J. Wilsing (Review) 176

Mount Hamilton: History of the Naming of, by W. W. Campbell 225 Rainfall at, by J. D. Maddrill 69

Mount Wilson: A Road to 251 Smithsonian Expedition to 229

Naval Observatory, Mare Island, Report of, 1905, by T. J. J. See . 156 Nebular Hypothesis, The, by R. G. Aitken m Newkirk, Burt L., Eros Comparison-Stars, 317; Motions of the

Inner Planets, 316; On the Parallax of the Central Star of the Annular Nebula in Lyra, 140 ; A Review of Certain Researches on Radio-activity that have a Bearing upon Astronomical Questions, 289; Stereoscopic Determinations of Proper Motion, 254; Two Articles on Cometary Motion 88



326 Publications of the PAGE

Notes from Pacific Coast Observatories . 59, 131, 212, 250, 268, 306 Nova Aquilœ, No. 2, by J. D. Maddrill 69, 310 O'Halloran, Rose, Variable-Star Notes 50 Omori, F., Observations of Distant Earthquakes, 193; On Seismic

Motion and Some Relations of Earthquakes to Other Phe- nomena 235

Parallax of the Central Star of the Annular Nebula in Lyra, On the, by B. L. Newkirk 140

Perrine, C. D., Color of the Shadows of Jupiter's Satellites Projected on the Disk of the Planet, 77 ; The Lick Observa- tory-Crocker Eclipse Expedition to Spain (with W W. Camp- bell), 13; The Measurement and Reduction of the Photo- graphs of Eros Made with the Crossley Reflector in 1900, 226 ; Note on Some Simplifications in the Reduction of Stellar Photographs, 309; Orbit of the Sixth Satellite of Jupiter, 80 ; Reobservation of Jupiter's Sixth Satellite, 271 ; Reobserva- tion of Phœbe, the Ninth Satellite of Saturn, 271 ; Reobserva- tion of the Seventh Satellite of Jupiter, 274; The Sixth and Seventh Satellites of Jupiter at the Opposition of 1905- 1906 . 78

Photometer Observations of B. D. + 51 °. 2,676, by J. D. Maddrill.. 312 Planetary Inversion 278 Planetary Phenomena, by M. McNeil . . 55, 128, 209, 247, 265, 302 Planets, Motions of the Inner, by B. L. Newkirk 316 Polaris, The Radial Motions of, by W. W. Campbell .... 307 Proper Motion, Stereoscopic Determinations of, by B. L. New-

kirk 254 Radial Velocity of a Draconis, Note on the Recent Observations

of the, by J. H. Moore 66 Radio-activity, A Review of Certain Researches on, that have a

Bearing upon Astronomical Questions, by B. L. Newkirk . 289 Refraction, Note on Anomalous, by Frank Schlesinger and

G. B. Blair 46 Reports of Observatories for 1905 146 Satellites. (See Jupiter and Saturn.) Saturn:

Eclipses of the Satellites of, Occurring in the Year 1906, by H. Struve 203

Reobservation of Phœbe, the Ninth Satellite of, by C. D. Perrine 271

Schlesinger, Frank, Note on Anomalous Refraction (with G. B. Blair) 46

See, T. J. J., Report of Naval Observatory, Mare Island, 1905 . . 156 Seismological Stations in California, by A. O. Leuschner . . . 218 Smith, Elliott, Photographs of Comet c 1905 83 Snow Telescope, Some Tests of the, by G. E. Hale 73



Astronomical Society of the Pacific. 327 Solar Observatory: page

The Five-foot Reflector of the, by G. E. Hale ....... 224 New Members of the Staff of the 228 A 100-inch Mirror for the, by G. E. Hale . . 272 Organization of the Computing Division of the, by G. E. Hale . 223 Report of the, of the Carnegie Institution of Washington for

1905, by G. E. Hale 156 (See, also, Mt. Wilson.)

Solar Research, A Programme of, by G. E. Hale 59 Spectra of Sun-Spots. (See Sun-Spots.) Spectroscopic Binaries :

First Catalogue of, by W. W. Campbell and H. D. Curtis . . 62 Seven New, by W. W. Campbell and J. H. Moore 308 ^Andromeda?, by K. Burns 306 U Aquilœ, by S. Albrecht 142 •S" U Cygni, by J. D. Maddrill 252 'Hydrœ, by J. H. Moore 67 Y Ophiuchi, by Seb. Albrecht • 66

Stellar Parallax Work at the Yale Observatory, by R. G. Aitken . 275 Stellar Photographs, Note on Some Simplifications in the Reduc-

tion of, by C. D. Perrine 309 Struve, Hermann, Eclipses of the Satellites of Saturn Occurring

in the Year 1906 203 Students' Observatory, Berkeley, Report of, 1905, by A. O.

Leuschner 164 Sun-Spot Spectra, On the Cause of the Characteristic Phenomena

of, by G E. Hale, W. S. Adams, and H. G. Gale .... 268 Sun-Spots :

Identification of Faint Lines in the Spectra of, by G. E. Hale . 222 Note on the Level of, by G. E. Hale 250 Photographic Observations of the Spectra of, by G. E. Hale

and W. S. Adams 76 Total Eclipses.. (See Eclipses.) Townley, S. D., Address of the Retiring President of the Society

in Awarding the Bruce Medal to Geheimer Ober-reg. Rath Professor Dr. Hermann Carl Vogel, ioi ; The California Earthquake' at Ukiah, 217; The Fifth Satellite of Jupiter, 94; The Harvard Five-foot Reflector, 170; The Latitude of Ukiah before and after April 18, 1906, 241 ; Report of the Inter- national Latitude Observatory, Ukiah, 1905, 147 ; Variation of Latitude 315

Transit Micrometer, A Test of a, by John F. Hayford, Review by A. S. Flint 90

Untersuchungen an den Spektren der helleren Gasnebel, von J. Scheiner und J. Wilsing, Review by J. H. Moore .... 176

Variable Radial Velocity and the Period of S U Cygni, The, by J. D. Maddrill 252

Variable Star, A New, by R. G. Aitken 312



328 Publications of the Astronomical Society, &c. PAGE

Variable-Star Notes, by Rose O'Halloran 50 Variable Stars, Observations of, in 1905, by Torvald Kohl . . 122 Variable Velocity, Two Stars with, by W. W. Campbell and J. H.

Moore 137 Variation of Latitude, Note on, by S. D. Townley 315 Vogel, Carl Hermann, Award of the Bruce Medal to . .101, 183 Yale Observatory, Stellar Parallax Work at the, by R. G. Aitken . 275



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